Without delay, let's solve this. We've got 12 and we will be multiplying it by 6, that is, adding 12 to itself 6 times.
Step 1: 0 + 12 = 12
Step 2: 12 + 12 = 24
Step 3: 24 + 12 = 36
Step 4: 36 + 12 = 48
Step 5: 48 + 12 = 60
Step 6: 60 + 12 = 72

So, 12*6 = 72